boynton



N. A. BO YN-TON. Hot-Air Furnace.

Patented Aug. 8, 1854.

W J W R PETERS. Pmwumo n ner. Washington, 0. c.

NATHANIEL A. BOYNTON, OF NEW YORK, N. Y.

AIR-HEATING STOVE.

i Specification of Letters Patent No. 11,469, dated August 8, 1854.

To all whom it may concern."

Be it knownthat I, N. A. BOYNTON, of

the city, county, and State of New York,

have invented a new and useful Improvement in Constructlng Heating-Stoves; and

I do hereby declare the following to be a full, clear, and exact'description thereof, reference being had to the accompanying drawing, in which- Figure 1 is a side elevation. Fig. 2 is a view of the fire chamber; Fig. 3, a horizonital section of the stoves.

ed, and the construction greatly simplified,

while/from its form great facility is given for unequal expansion and contraction in the fire chamber without injury.

I form the fire chamber (a,) of which a perspective view is given in Fig. 2, of a single casting, in a shape approaching an oblate spheroid, with its sides corrugated vertically, with deep corrugations a circular opening at the top, at (6,) for the funnel, and an oblong rectangular opening at (c) in front,for the admission of fuel.

This fire chamber is placed with its shortest diameter horizontal in an outer case of any form or style of ornament, made of sheet or cast iron, which has an opening through the center of the bottom, to admit the external air; and another at the center of the top for the funnel from the fire chamber to pass through; around the outer portion of this top there are smaller holes inornamental series for the heated air to pass off. A door in the front of this case corresponds with the'holein front of the fire chamber; by this means I form a simple and cheap heater.

Having thus fully described my improvement, what I claim therein as new, and for which I desire to secure Letters Patent, is-

Constructing the entire fire chamber of one single casting or piece, substantially in the manner and for the purposes set forth.

" N. A. BOYNTON.

Witnesses:

WM. GREENOUGH, THos. E. WARREN. 

